Enhancement of photoelectrochemical activity for water splitting by controlling hydrodynamic conditions on titanium anodization

JOURNAL OF POWER SOURCES

卷:286

Article

Sanchez-Tovar, R.¹  Fernandez-Domene, R. M.¹  Garcia-Garcia, D. M.¹  Garcia-Anton, J.¹ 

[1] Univ Politecn Valencia, Dept Ingn Quim & Nucl, ETSI Ind, Ingn Electroquim & Corros, E-46022 Valencia, Spain

关键词: TiO2 nanostructures;    Anodization;    Hydrodynamic conditions;    Water splitting;    Electrochemical Impedance Spectroscopy;    Mott-Schottky analysis;   

DOI  :  10.1016/j.jpowsour.2015.03.174

来源: Elsevier

【 摘 要 】

This work studies the electrochemical and photoelectrochemical properties of a new type of TiO2 nanostructure (nanosponge) obtained by means of anodization in a glycerol/water/NH4F electrolyte under controlled hydrodynamic conditions. For this purpose different techniques such as Scanning Electronic Microscopy (SEM), Raman Spectroscopy, Electrochemical Impedance Spectroscopy (EIS) measurements, Mott-Schottky (M-S) analysis and photoelectrochemical water splitting tests under standard AM 1.5 conditions are carried out. The obtained results show that electron-hole separation is facilitated in the TiO2 nanosponge if compared with highly ordered TiO2 nanotube arrays. As a result, nanosponges enhance the photoelectrochemical activity for water splitting. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free